GB2406985A - An RF transmitter with optimal control of amplifier bias with respect to efficiency and adjacent channel power - Google Patents

An RF transmitter with optimal control of amplifier bias with respect to efficiency and adjacent channel power Download PDF

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Publication number
GB2406985A
GB2406985A GB0323450A GB0323450A GB2406985A GB 2406985 A GB2406985 A GB 2406985A GB 0323450 A GB0323450 A GB 0323450A GB 0323450 A GB0323450 A GB 0323450A GB 2406985 A GB2406985 A GB 2406985A
Authority
GB
United Kingdom
Prior art keywords
signal
level
distortion level
transmitter
distortion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB0323450A
Other languages
English (en)
Other versions
GB0323450D0 (en
Inventor
Andrew Cunningham
Richard Arthur Hillum
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SOFTWARE RADIO TECHNOLOGY Ltd
Original Assignee
SOFTWARE RADIO TECHNOLOGY Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SOFTWARE RADIO TECHNOLOGY Ltd filed Critical SOFTWARE RADIO TECHNOLOGY Ltd
Priority to GB0323450A priority Critical patent/GB2406985A/en
Publication of GB0323450D0 publication Critical patent/GB0323450D0/en
Priority to EP03257549A priority patent/EP1523101A2/en
Priority to KR1020030087845A priority patent/KR20050034520A/ko
Priority to JP2003414306A priority patent/JP2005117605A/ja
Publication of GB2406985A publication Critical patent/GB2406985A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • H03F1/0261—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the polarisation voltage or current, e.g. gliding Class A
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0475—Circuits with means for limiting noise, interference or distortion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B2001/0408—Circuits with power amplifiers
    • H04B2001/0433—Circuits with power amplifiers with linearisation using feedback

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Transmitters (AREA)
GB0323450A 2003-10-07 2003-10-07 An RF transmitter with optimal control of amplifier bias with respect to efficiency and adjacent channel power Withdrawn GB2406985A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB0323450A GB2406985A (en) 2003-10-07 2003-10-07 An RF transmitter with optimal control of amplifier bias with respect to efficiency and adjacent channel power
EP03257549A EP1523101A2 (en) 2003-10-07 2003-12-01 Radio transmitter
KR1020030087845A KR20050034520A (ko) 2003-10-07 2003-12-05 무선 송신기
JP2003414306A JP2005117605A (ja) 2003-10-07 2003-12-12 無線送信機

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0323450A GB2406985A (en) 2003-10-07 2003-10-07 An RF transmitter with optimal control of amplifier bias with respect to efficiency and adjacent channel power

Publications (2)

Publication Number Publication Date
GB0323450D0 GB0323450D0 (en) 2003-11-05
GB2406985A true GB2406985A (en) 2005-04-13

Family

ID=29415667

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0323450A Withdrawn GB2406985A (en) 2003-10-07 2003-10-07 An RF transmitter with optimal control of amplifier bias with respect to efficiency and adjacent channel power

Country Status (4)

Country Link
EP (1) EP1523101A2 (ja)
JP (1) JP2005117605A (ja)
KR (1) KR20050034520A (ja)
GB (1) GB2406985A (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2432271A (en) * 2005-11-15 2007-05-16 Motorola Inc A Cartesian RF transmitter with an adaptive amplifier power supply voltage

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008098830A (ja) * 2006-10-10 2008-04-24 Matsushita Electric Ind Co Ltd 送信回路及び携帯端末装置
EP2621093B1 (en) * 2012-01-27 2019-04-03 BlackBerry Limited Mobile wireless communications device with selective power amplifier control and related methods
CN106788500B (zh) * 2017-01-11 2019-04-12 北京小米移动软件有限公司 一种终端

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6112059A (en) * 1997-11-12 2000-08-29 Motorola, Inc. Off-channel leakage power monitor apparatus and method
US6275103B1 (en) * 1998-09-02 2001-08-14 Fujitsu Limited Predistorter of amplifier and amplifying unit
US20020021687A1 (en) * 2000-06-14 2002-02-21 Kazuya Toki Time-division multiplexing radio system
EP1185009A2 (en) * 2000-08-30 2002-03-06 Kabushiki Kaisha Toshiba Leak power ratio detection circuit, mobile communication terminal, and control circuit for mobile communication terminal
GB2369734A (en) * 2000-12-02 2002-06-05 Roke Manor Research Improving the linearity and efficiency of an amplifier by adjusting a bias current in accordance with leakage to an adjacent channel
WO2002089323A2 (de) * 2001-04-26 2002-11-07 Siemens Aktiengesellschaft Schaltungsanordnung und verfahren zur arbeitspunkteinstellung eines leistungsverstärkers

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6112059A (en) * 1997-11-12 2000-08-29 Motorola, Inc. Off-channel leakage power monitor apparatus and method
US6275103B1 (en) * 1998-09-02 2001-08-14 Fujitsu Limited Predistorter of amplifier and amplifying unit
US20020021687A1 (en) * 2000-06-14 2002-02-21 Kazuya Toki Time-division multiplexing radio system
EP1185009A2 (en) * 2000-08-30 2002-03-06 Kabushiki Kaisha Toshiba Leak power ratio detection circuit, mobile communication terminal, and control circuit for mobile communication terminal
GB2369734A (en) * 2000-12-02 2002-06-05 Roke Manor Research Improving the linearity and efficiency of an amplifier by adjusting a bias current in accordance with leakage to an adjacent channel
WO2002089323A2 (de) * 2001-04-26 2002-11-07 Siemens Aktiengesellschaft Schaltungsanordnung und verfahren zur arbeitspunkteinstellung eines leistungsverstärkers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2432271A (en) * 2005-11-15 2007-05-16 Motorola Inc A Cartesian RF transmitter with an adaptive amplifier power supply voltage
GB2432271B (en) * 2005-11-15 2007-10-10 Motorola Inc Linear RF transmitter and method of operation

Also Published As

Publication number Publication date
JP2005117605A (ja) 2005-04-28
KR20050034520A (ko) 2005-04-14
EP1523101A2 (en) 2005-04-13
GB0323450D0 (en) 2003-11-05

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)